| /* |
| ** Based on the UCB version with the copyright notice and sccsid |
| ** appearing below. |
| ** |
| ** This is ANSIish only when "multibyte character == plain character". |
| */ |
| |
| #include "private.h" |
| |
| /* |
| ** Copyright (c) 1989 The Regents of the University of California. |
| ** All rights reserved. |
| ** |
| ** Redistribution and use in source and binary forms are permitted |
| ** provided that the above copyright notice and this paragraph are |
| ** duplicated in all such forms and that any documentation, |
| ** advertising materials, and other materials related to such |
| ** distribution and use acknowledge that the software was developed |
| ** by the University of California, Berkeley. The name of the |
| ** University may not be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR |
| ** IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| ** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| #include "tzfile.h" |
| #include "fcntl.h" |
| #include "locale.h" |
| |
| #if __ANDROID__ |
| |
| /* LP32 had a 32-bit time_t, so we need to work around that here. */ |
| #if defined(__LP64__) |
| #define time64_t time_t |
| #define mktime64 mktime |
| #else |
| #include <time64.h> |
| #endif |
| |
| #include <ctype.h> |
| |
| #endif |
| |
| struct lc_time_T { |
| const char * mon[MONSPERYEAR]; |
| const char * month[MONSPERYEAR]; |
| const char * wday[DAYSPERWEEK]; |
| const char * weekday[DAYSPERWEEK]; |
| const char * X_fmt; |
| const char * x_fmt; |
| const char * c_fmt; |
| const char * am; |
| const char * pm; |
| const char * date_fmt; |
| }; |
| |
| #define Locale (&C_time_locale) |
| |
| static const struct lc_time_T C_time_locale = { |
| { |
| "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
| }, { |
| "January", "February", "March", "April", "May", "June", |
| "July", "August", "September", "October", "November", "December" |
| }, { |
| "Sun", "Mon", "Tue", "Wed", |
| "Thu", "Fri", "Sat" |
| }, { |
| "Sunday", "Monday", "Tuesday", "Wednesday", |
| "Thursday", "Friday", "Saturday" |
| }, |
| |
| /* X_fmt */ |
| "%H:%M:%S", |
| |
| /* |
| ** x_fmt |
| ** C99 requires this format. |
| ** Using just numbers (as here) makes Quakers happier; |
| ** it's also compatible with SVR4. |
| */ |
| "%m/%d/%y", |
| |
| /* |
| ** c_fmt |
| ** C99 requires this format. |
| ** Previously this code used "%D %X", but we now conform to C99. |
| ** Note that |
| ** "%a %b %d %H:%M:%S %Y" |
| ** is used by Solaris 2.3. |
| */ |
| "%a %b %e %T %Y", |
| |
| /* am */ |
| "AM", |
| |
| /* pm */ |
| "PM", |
| |
| /* date_fmt */ |
| "%a %b %e %H:%M:%S %Z %Y" |
| }; |
| |
| static char * _add(const char *, char *, const char *, int); |
| static char * _conv(int, const char *, char *, const char *); |
| static char * _fmt(const char *, const struct tm *, char *, const char *, |
| int *); |
| static char * _yconv(int, int, bool, bool, char *, const char *, int); |
| static char * getformat(int, char *, char *, char *, char *); |
| |
| extern char * tzname[]; |
| |
| #ifndef YEAR_2000_NAME |
| #define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS" |
| #endif /* !defined YEAR_2000_NAME */ |
| |
| #define IN_NONE 0 |
| #define IN_SOME 1 |
| #define IN_THIS 2 |
| #define IN_ALL 3 |
| |
| #define FORCE_LOWER_CASE 0x100 |
| |
| size_t |
| strftime(char *s, size_t maxsize, const char *format, const struct tm *t) |
| { |
| char * p; |
| int warn; |
| |
| tzset(); |
| warn = IN_NONE; |
| p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn); |
| #ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU |
| if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) { |
| fprintf(stderr, "\n"); |
| if (format == NULL) |
| fprintf(stderr, "NULL strftime format "); |
| else fprintf(stderr, "strftime format \"%s\" ", |
| format); |
| fprintf(stderr, "yields only two digits of years in "); |
| if (warn == IN_SOME) |
| fprintf(stderr, "some locales"); |
| else if (warn == IN_THIS) |
| fprintf(stderr, "the current locale"); |
| else fprintf(stderr, "all locales"); |
| fprintf(stderr, "\n"); |
| } |
| #endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */ |
| if (p == s + maxsize) |
| return 0; |
| *p = '\0'; |
| return p - s; |
| } |
| |
| static char *getformat(int modifier, char *normal, char *underscore, |
| char *dash, char *zero) { |
| switch (modifier) { |
| case '_': |
| return underscore; |
| case '-': |
| return dash; |
| case '0': |
| return zero; |
| } |
| return normal; |
| } |
| |
| static char * |
| _fmt(const char *format, const struct tm *t, char *pt, |
| const char *ptlim, int *warnp) |
| { |
| for ( ; *format; ++format) { |
| if (*format == '%') { |
| int modifier = 0; |
| label: |
| switch (*++format) { |
| case '\0': |
| --format; |
| break; |
| case 'A': |
| pt = _add((t->tm_wday < 0 || |
| t->tm_wday >= DAYSPERWEEK) ? |
| "?" : Locale->weekday[t->tm_wday], |
| pt, ptlim, modifier); |
| continue; |
| case 'a': |
| pt = _add((t->tm_wday < 0 || |
| t->tm_wday >= DAYSPERWEEK) ? |
| "?" : Locale->wday[t->tm_wday], |
| pt, ptlim, modifier); |
| continue; |
| case 'B': |
| pt = _add((t->tm_mon < 0 || |
| t->tm_mon >= MONSPERYEAR) ? |
| "?" : Locale->month[t->tm_mon], |
| pt, ptlim, modifier); |
| continue; |
| case 'b': |
| case 'h': |
| pt = _add((t->tm_mon < 0 || |
| t->tm_mon >= MONSPERYEAR) ? |
| "?" : Locale->mon[t->tm_mon], |
| pt, ptlim, modifier); |
| continue; |
| case 'C': |
| /* |
| ** %C used to do a... |
| ** _fmt("%a %b %e %X %Y", t); |
| ** ...whereas now POSIX 1003.2 calls for |
| ** something completely different. |
| ** (ado, 1993-05-24) |
| */ |
| pt = _yconv(t->tm_year, TM_YEAR_BASE, |
| true, false, pt, ptlim, modifier); |
| continue; |
| case 'c': |
| { |
| int warn2 = IN_SOME; |
| |
| pt = _fmt(Locale->c_fmt, t, pt, ptlim, &warn2); |
| if (warn2 == IN_ALL) |
| warn2 = IN_THIS; |
| if (warn2 > *warnp) |
| *warnp = warn2; |
| } |
| continue; |
| case 'D': |
| pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp); |
| continue; |
| case 'd': |
| pt = _conv(t->tm_mday, getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'E': |
| case 'O': |
| /* |
| ** C99 locale modifiers. |
| ** The sequences |
| ** %Ec %EC %Ex %EX %Ey %EY |
| ** %Od %oe %OH %OI %Om %OM |
| ** %OS %Ou %OU %OV %Ow %OW %Oy |
| ** are supposed to provide alternate |
| ** representations. |
| */ |
| goto label; |
| case '_': |
| case '-': |
| case '0': |
| case '^': |
| case '#': |
| modifier = *format; |
| goto label; |
| case 'e': |
| pt = _conv(t->tm_mday, getformat(modifier, "%2d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'F': |
| pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp); |
| continue; |
| case 'H': |
| pt = _conv(t->tm_hour, getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'I': |
| pt = _conv((t->tm_hour % 12) ? |
| (t->tm_hour % 12) : 12, |
| getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'j': |
| pt = _conv(t->tm_yday + 1, getformat(modifier, "%03d", "%3d", "%d", "%03d"), pt, ptlim); |
| continue; |
| case 'k': |
| /* |
| ** This used to be... |
| ** _conv(t->tm_hour % 12 ? |
| ** t->tm_hour % 12 : 12, 2, ' '); |
| ** ...and has been changed to the below to |
| ** match SunOS 4.1.1 and Arnold Robbins' |
| ** strftime version 3.0. That is, "%k" and |
| ** "%l" have been swapped. |
| ** (ado, 1993-05-24) |
| */ |
| pt = _conv(t->tm_hour, getformat(modifier, "%2d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| #ifdef KITCHEN_SINK |
| case 'K': |
| /* |
| ** After all this time, still unclaimed! |
| */ |
| pt = _add("kitchen sink", pt, ptlim); |
| continue; |
| #endif /* defined KITCHEN_SINK */ |
| case 'l': |
| /* |
| ** This used to be... |
| ** _conv(t->tm_hour, 2, ' '); |
| ** ...and has been changed to the below to |
| ** match SunOS 4.1.1 and Arnold Robbin's |
| ** strftime version 3.0. That is, "%k" and |
| ** "%l" have been swapped. |
| ** (ado, 1993-05-24) |
| */ |
| pt = _conv((t->tm_hour % 12) ? |
| (t->tm_hour % 12) : 12, |
| getformat(modifier, "%2d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'M': |
| pt = _conv(t->tm_min, getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'm': |
| pt = _conv(t->tm_mon + 1, getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'n': |
| pt = _add("\n", pt, ptlim, modifier); |
| continue; |
| case 'P': |
| case 'p': |
| pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? |
| Locale->pm : |
| Locale->am, |
| pt, ptlim, (*format == 'P') ? FORCE_LOWER_CASE : modifier); |
| continue; |
| case 'R': |
| pt = _fmt("%H:%M", t, pt, ptlim, warnp); |
| continue; |
| case 'r': |
| pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp); |
| continue; |
| case 'S': |
| pt = _conv(t->tm_sec, getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 's': |
| { |
| struct tm tm; |
| char buf[INT_STRLEN_MAXIMUM( |
| time64_t) + 1]; |
| time64_t mkt; |
| |
| tm = *t; |
| mkt = mktime64(&tm); |
| if (TYPE_SIGNED(time64_t)) |
| snprintf(buf, sizeof(buf), "%"PRIdMAX, |
| (intmax_t) mkt); |
| else snprintf(buf, sizeof(buf), "%"PRIuMAX, |
| (uintmax_t) mkt); |
| pt = _add(buf, pt, ptlim, modifier); |
| } |
| continue; |
| case 'T': |
| pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp); |
| continue; |
| case 't': |
| pt = _add("\t", pt, ptlim, modifier); |
| continue; |
| case 'U': |
| pt = _conv((t->tm_yday + DAYSPERWEEK - |
| t->tm_wday) / DAYSPERWEEK, |
| getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'u': |
| /* |
| ** From Arnold Robbins' strftime version 3.0: |
| ** "ISO 8601: Weekday as a decimal number |
| ** [1 (Monday) - 7]" |
| ** (ado, 1993-05-24) |
| */ |
| pt = _conv((t->tm_wday == 0) ? |
| DAYSPERWEEK : t->tm_wday, |
| "%d", pt, ptlim); |
| continue; |
| case 'V': /* ISO 8601 week number */ |
| case 'G': /* ISO 8601 year (four digits) */ |
| case 'g': /* ISO 8601 year (two digits) */ |
| /* |
| ** From Arnold Robbins' strftime version 3.0: "the week number of the |
| ** year (the first Monday as the first day of week 1) as a decimal number |
| ** (01-53)." |
| ** (ado, 1993-05-24) |
| ** |
| ** From <http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html> by Markus Kuhn: |
| ** "Week 01 of a year is per definition the first week which has the |
| ** Thursday in this year, which is equivalent to the week which contains |
| ** the fourth day of January. In other words, the first week of a new year |
| ** is the week which has the majority of its days in the new year. Week 01 |
| ** might also contain days from the previous year and the week before week |
| ** 01 of a year is the last week (52 or 53) of the previous year even if |
| ** it contains days from the new year. A week starts with Monday (day 1) |
| ** and ends with Sunday (day 7). For example, the first week of the year |
| ** 1997 lasts from 1996-12-30 to 1997-01-05..." |
| ** (ado, 1996-01-02) |
| */ |
| { |
| int year; |
| int base; |
| int yday; |
| int wday; |
| int w; |
| |
| year = t->tm_year; |
| base = TM_YEAR_BASE; |
| yday = t->tm_yday; |
| wday = t->tm_wday; |
| for ( ; ; ) { |
| int len; |
| int bot; |
| int top; |
| |
| len = isleap_sum(year, base) ? |
| DAYSPERLYEAR : |
| DAYSPERNYEAR; |
| /* |
| ** What yday (-3 ... 3) does |
| ** the ISO year begin on? |
| */ |
| bot = ((yday + 11 - wday) % |
| DAYSPERWEEK) - 3; |
| /* |
| ** What yday does the NEXT |
| ** ISO year begin on? |
| */ |
| top = bot - |
| (len % DAYSPERWEEK); |
| if (top < -3) |
| top += DAYSPERWEEK; |
| top += len; |
| if (yday >= top) { |
| ++base; |
| w = 1; |
| break; |
| } |
| if (yday >= bot) { |
| w = 1 + ((yday - bot) / |
| DAYSPERWEEK); |
| break; |
| } |
| --base; |
| yday += isleap_sum(year, base) ? |
| DAYSPERLYEAR : |
| DAYSPERNYEAR; |
| } |
| #ifdef XPG4_1994_04_09 |
| if ((w == 52 && |
| t->tm_mon == TM_JANUARY) || |
| (w == 1 && |
| t->tm_mon == TM_DECEMBER)) |
| w = 53; |
| #endif /* defined XPG4_1994_04_09 */ |
| if (*format == 'V') |
| pt = _conv(w, getformat(modifier, "%02d", "%2d", "%d", "%02d"), |
| pt, ptlim); |
| else if (*format == 'g') { |
| *warnp = IN_ALL; |
| pt = _yconv(year, base, |
| false, true, |
| pt, ptlim, modifier); |
| } else pt = _yconv(year, base, |
| true, true, |
| pt, ptlim, modifier); |
| } |
| continue; |
| case 'v': |
| /* |
| ** From Arnold Robbins' strftime version 3.0: |
| ** "date as dd-bbb-YYYY" |
| ** (ado, 1993-05-24) |
| */ |
| pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp); |
| continue; |
| case 'W': |
| pt = _conv((t->tm_yday + DAYSPERWEEK - |
| (t->tm_wday ? |
| (t->tm_wday - 1) : |
| (DAYSPERWEEK - 1))) / DAYSPERWEEK, |
| getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| continue; |
| case 'w': |
| pt = _conv(t->tm_wday, "%d", pt, ptlim); |
| continue; |
| case 'X': |
| pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp); |
| continue; |
| case 'x': |
| { |
| int warn2 = IN_SOME; |
| |
| pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2); |
| if (warn2 == IN_ALL) |
| warn2 = IN_THIS; |
| if (warn2 > *warnp) |
| *warnp = warn2; |
| } |
| continue; |
| case 'y': |
| *warnp = IN_ALL; |
| pt = _yconv(t->tm_year, TM_YEAR_BASE, |
| false, true, |
| pt, ptlim, modifier); |
| continue; |
| case 'Y': |
| pt = _yconv(t->tm_year, TM_YEAR_BASE, |
| true, true, |
| pt, ptlim, modifier); |
| continue; |
| case 'Z': |
| #ifdef TM_ZONE |
| pt = _add(t->TM_ZONE, pt, ptlim, modifier); |
| #else |
| if (t->tm_isdst >= 0) |
| pt = _add(tzname[t->tm_isdst != 0], |
| pt, ptlim); |
| #endif |
| /* |
| ** C99 says that %Z must be replaced by the |
| ** empty string if the time zone is not |
| ** determinable. |
| */ |
| continue; |
| case 'z': |
| { |
| long diff; |
| char const * sign; |
| |
| if (t->tm_isdst < 0) |
| continue; |
| #ifdef TM_GMTOFF |
| diff = t->TM_GMTOFF; |
| #else /* !defined TM_GMTOFF */ |
| /* |
| ** C99 says that the UT offset must |
| ** be computed by looking only at |
| ** tm_isdst. This requirement is |
| ** incorrect, since it means the code |
| ** must rely on magic (in this case |
| ** altzone and timezone), and the |
| ** magic might not have the correct |
| ** offset. Doing things correctly is |
| ** tricky and requires disobeying C99; |
| ** see GNU C strftime for details. |
| ** For now, punt and conform to the |
| ** standard, even though it's incorrect. |
| ** |
| ** C99 says that %z must be replaced by the |
| ** empty string if the time zone is not |
| ** determinable, so output nothing if the |
| ** appropriate variables are not available. |
| */ |
| if (t->tm_isdst == 0) |
| #ifdef USG_COMPAT |
| diff = -timezone; |
| #else /* !defined USG_COMPAT */ |
| continue; |
| #endif /* !defined USG_COMPAT */ |
| else |
| #ifdef ALTZONE |
| diff = -altzone; |
| #else /* !defined ALTZONE */ |
| continue; |
| #endif /* !defined ALTZONE */ |
| #endif /* !defined TM_GMTOFF */ |
| if (diff < 0) { |
| sign = "-"; |
| diff = -diff; |
| } else sign = "+"; |
| pt = _add(sign, pt, ptlim, modifier); |
| diff /= SECSPERMIN; |
| diff = (diff / MINSPERHOUR) * 100 + |
| (diff % MINSPERHOUR); |
| pt = _conv(diff, getformat(modifier, "%04d", "%4d", "%d", "%04d"), pt, ptlim); |
| } |
| continue; |
| case '+': |
| pt = _fmt(Locale->date_fmt, t, pt, ptlim, |
| warnp); |
| continue; |
| case '%': |
| /* |
| ** X311J/88-090 (4.12.3.5): if conversion char is |
| ** undefined, behavior is undefined. Print out the |
| ** character itself as printf(3) also does. |
| */ |
| default: |
| break; |
| } |
| } |
| if (pt == ptlim) |
| break; |
| *pt++ = *format; |
| } |
| return pt; |
| } |
| |
| static char * |
| _conv(int n, const char *format, char *pt, const char *ptlim) |
| { |
| char buf[INT_STRLEN_MAXIMUM(int) + 1]; |
| |
| snprintf(buf, sizeof(buf), format, n); |
| return _add(buf, pt, ptlim, 0); |
| } |
| |
| static char * |
| _add(const char *str, char *pt, const char *const ptlim, int modifier) |
| { |
| int c; |
| |
| switch (modifier) { |
| case FORCE_LOWER_CASE: |
| while (pt < ptlim && (*pt = tolower(*str++)) != '\0') { |
| ++pt; |
| } |
| break; |
| |
| case '^': |
| while (pt < ptlim && (*pt = toupper(*str++)) != '\0') { |
| ++pt; |
| } |
| break; |
| |
| case '#': |
| while (pt < ptlim && (c = *str++) != '\0') { |
| if (isupper(c)) { |
| c = tolower(c); |
| } else if (islower(c)) { |
| c = toupper(c); |
| } |
| *pt = c; |
| ++pt; |
| } |
| |
| break; |
| |
| default: |
| while (pt < ptlim && (*pt = *str++) != '\0') { |
| ++pt; |
| } |
| } |
| |
| return pt; |
| } |
| |
| /* |
| ** POSIX and the C Standard are unclear or inconsistent about |
| ** what %C and %y do if the year is negative or exceeds 9999. |
| ** Use the convention that %C concatenated with %y yields the |
| ** same output as %Y, and that %Y contains at least 4 bytes, |
| ** with more only if necessary. |
| */ |
| |
| static char * |
| _yconv(int a, int b, bool convert_top, bool convert_yy, |
| char *pt, const char *ptlim, int modifier) |
| { |
| register int lead; |
| register int trail; |
| |
| #define DIVISOR 100 |
| trail = a % DIVISOR + b % DIVISOR; |
| lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR; |
| trail %= DIVISOR; |
| if (trail < 0 && lead > 0) { |
| trail += DIVISOR; |
| --lead; |
| } else if (lead < 0 && trail > 0) { |
| trail -= DIVISOR; |
| ++lead; |
| } |
| if (convert_top) { |
| if (lead == 0 && trail < 0) |
| pt = _add("-0", pt, ptlim, modifier); |
| else pt = _conv(lead, getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| } |
| if (convert_yy) |
| pt = _conv(((trail < 0) ? -trail : trail), getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim); |
| return pt; |
| } |
